The IEM server resides in a room that is climate controlled by a
dedicated heat exchanger. This page presents daily plots of logged
temperatures. There are four one-wire sensors measuring ambient temperature.
The arrangement of these sensors has changed over the years.
The current temperature observation points are:

In Air Handler: Located at 5 feet above the floor at the
intake of the heat exchanger.

Out Air Handler: Located below the sub floor where the
cooled air departs the heat exchanger.

In Rack: Located on the front door of the rack at about 1 meter
height.